import os
import sys

from . import ESPLINK_dialog
from . import FIRMATA_dialog
from . import HTTP_dialog
from . import SERIAL_dialog
from . import SOCKET_dialog
from . import TCPLINK_dialog
from . import UDPLINK_dialog
from .ConnectorBase import ConnectorBase
from .ESPLINK import ESPLINK_connector_factory
from .FIRMATA import FIRMATA_connector_factory
from .HTTP import HTTP_connector_factory
from .SERIAL import SERIAL_connector_factory
from .SOCKET import SOCKET_connector_factory
from .TCPLINK import TCPLINK_connector_factory
from .UDPLINK import UDPLINK_connector_factory

sys.path.append(os.path.dirname(__file__))
connectors_packages = ["FIRMATA"]


def _GetLocalConnectorClassFactory(name):
    """
    Args:
        name:
    """
    return lambda: getattr(connectors_packages[name][0])


connectors = {"FIRMATA": (FIRMATA_connector_factory, FIRMATA_dialog),
              "NETWORK": (FIRMATA_connector_factory, FIRMATA_dialog)}
_dialogs_imported = False
per_URI_connectors = None
schemes = None


# lazy import of connectors dialogs, only if used
def _Import_Dialogs():
    global per_URI_connectors, schemes, _dialogs_imported
    if not _dialogs_imported:
        _dialogs_imported = True
        per_URI_connectors = {}
        schemes = []
        for con_name in connectors_packages:
            module = connectors[con_name][1]

            for scheme in module.Schemes:
                per_URI_connectors[scheme] = getattr(module, con_name + '_dialog')
                schemes += [scheme]


def ConnectorFactory(uri, confnodesroot, **kwargs):
    """Return a connector corresponding to the URI or None if cannot connect to
    URI

    Args:
        uri:
        confnodesroot:
    """
    _scheme = uri.split("://")[0].upper()

    # commented code to enable for MDNS:// support
    # _scheme, location = uri.split("://")
    # _scheme = _scheme.upper()

    if _scheme == "LOCAL":
        # naming = Pyro_naming()

        # Local is special case
        # pyro connection to local runtime
        # started on demand, listening on random port
        scheme = "PYRO"
        runtime_port = confnodesroot.AppFrame.StartLocalRuntime(
            taskbaricon=True)
        uri = "PYROLOC://127.0.0.1:" + str(runtime_port)

    # commented code to enable for MDNS:// support
    # elif _scheme == "MDNS":
    #     try:
    #         from zeroconf import Zeroconf
    #         r = Zeroconf()
    #         i = r.get_service_info(zeroconf_service_type, location)
    #         if i is None:
    #             raise Exception("'%s' not found" % location)
    #         ip = str(socket.inet_ntoa(i.address))
    #         port = str(i.port)
    #         newlocation = ip + ':' + port
    #         confnodesroot.logger.info(_("'{a1}' is located at {a2}\n").format(a1=location, a2=newlocation))
    #         location = newlocation
    #         # not a bug, but a workaround against obvious downgrade attack
    #         scheme = "PYROS"
    #         r.close()
    #     except Exception:
    #         confnodesroot.logger.error(_("MDNS resolution failure for '%s'\n") % location)
    #         confnodesroot.logger.error(traceback.format_exc())
    #         return None

    elif _scheme in connectors.keys():
        scheme = _scheme
    elif _scheme[-1] == 'S' and _scheme[:-1] in connectors.keys():
        scheme = _scheme[:-1]
    else:
        return None

    # import module according to uri type and get connector specific baseclass
    # first call to import the module,
    # then call with parameters to create the class
    connector_specific_class = connectors[scheme][0]

    if connector_specific_class is None:
        return None

    # new class inheriting from generic and specific connector base classes
    return connector_specific_class(uri, confnodesroot, **kwargs)


def EditorClassFromScheme(scheme):
    _Import_Dialogs()
    return per_URI_connectors.get(scheme, None)


def ConnectorSchemes():
    _Import_Dialogs()
    return schemes
